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Sam699
05-28-2020, 03:29 PM
We have a 2016 Montana 3711 upgrading tires to Sailun 637 ST 235/80R.
Questioning if I should also upgrade stock rims because of increase in tire pressure. Havenít gotten an answer from Keystone yet. Hope someone has info on this. Thanks!!

AZ Traveler
05-28-2020, 03:57 PM
Sam,

A 2016 should have 110 PSI rims. Crawl under it and look for the 110 stamp on the back side of the wheels to confirm.

dhuhn
05-28-2020, 04:02 PM
I agree I have a 2016 3720 with 110psi rims you should be ok check back of rim it should be stamped 110psi.

DQDick
05-28-2020, 05:34 PM
Some 2010's have 110# rims and others don't, but after that they all do.

Sam699
05-28-2020, 06:28 PM
Checked the rims and yes they are stamped 110.
Appreciate the feedback Thanks!!

Texan
05-29-2020, 01:04 AM
I would consider changing the rims only because two of the spoke style rims on my 2014 cracked and caused quick air loss. I know there are 1.000's of these rims on rv's but for me to have two on the same rv to crack were enough for me to change to aluminum modular wheels. These don't have the spokes so i would think they would be stronger though they are rated the same as factory wheels. Also Mobile Suites have the mod wheels and they weigh quite a bit more than our Montana's.

uhftx
05-29-2020, 08:02 AM
I purchased 4 new rims from wally world About 60 bucks each white spoke steel like what was on it then. when I purchased my Sailun tires. Mine were 80 psi rims. But my Monty is mega old and hardly used. Still haven't had it out yet during quarantine.

I also had a rim leak where the spoke was welded internally. Tire shop put in a tub of water and showed me the bubbles where the spoke met the outer rim.

Ram Montana High Country
05-29-2020, 08:36 AM
I agree I have a 2016 3720 with 110psi rims you should be ok check back of rim it should be stamped 110psi.

might not see stamp without pulling rim from hub

phillyg
06-10-2020, 03:49 PM
My 2016 3711FL has 110psi wheels.

Ram Montana High Country
06-10-2020, 04:21 PM
I agree I have a 2016 3720 with 110psi rims you should be ok check back of rim it should be stamped 110psi.

Not entirely sure, but IMHO, I had to remove rime to see the 110 psi stamp on back side of wheel spook. I know my '17 305RL had 110 psi wheels and spare was a steel wheel (easily handle same). Another good give away to wheel rating is if the valve stem is steel.

pinheadgraham02
06-11-2020, 11:44 AM
We have a 2016 Montana 3711 upgrading tires to Sailun 637 ST 235/80R.
Questioning if I should also upgrade stock rims because of increase in tire pressure. Havenít gotten an answer from Keystone yet. Hope someone has info on this. Thanks!!
We upgraded to the setup you reference about 1 1/2 years ago (2015 3610RL). I actually liked the style of the newer spoke mags so although pricey I ordered the tires and wheels from Keystone and had them shipped to my dealer. Had them take to a local tire shop and had them balanced and then installed. BTW don't forget the spare which I replaced also so the purchase was for 5 tires and wheels.

BuilderBob
06-11-2020, 12:47 PM
Your wheels should be good up to 110lb.

PNW Fireguy
06-11-2020, 03:08 PM
Even though our OEM rims were rated for 110psi when we upgraded our Sailuns we upgraded the wheels to take advantage of higher tire weight bearing rating.


3750 to 4200 per wheel

CalandLinda
06-11-2020, 09:08 PM
NOTE: You got 7000# vehicle certified axles? If so any rim that will withstand 110 PSI and provide 3500# of load capacity is acceptable.

PNW Fireguy
06-11-2020, 10:07 PM
NOTE: You got 7000# vehicle certified axles? If so any rim that will withstand 110 PSI and provide 3500# of load capacity is acceptable.

Not me.

mhs4771
06-12-2020, 06:54 AM
If you were getting new tires and rims you should have made the jump to 17.5s and really put tire and wheel worries behind you.

PSFORD99
06-13-2020, 01:23 PM
If you were getting new tires and rims you should have made the jump to 17.5s and really put tire and wheel worries behind you.


I can't imagine tire or wheel issues or worries with a 4080, 4400 G rated tire , running on these 110 psi rated wheels, it usually always a tire issue. Rim issues are rare.

I ran G rated tires on my 2008 Montana OE rims for 10 years , they were at one time supposed to have been rerated, and sent stickers to verify 110 psi and many switched to the G rated tires, me included , only to find out later they changed their minds, If I remember right, that was Tredit. Never an issue with those wheels.

Texan
06-13-2020, 02:44 PM
Rim issues may be rare but i had 2 rims crack in 3 years. The spoke wheels are very popular but the weak link is the spoke. I changed to the modular wheels to get away from the spokes 3 years ago and so far so good. I might have just gotten a bad batch of wheels but 2 wheels going bad was enough for me. Fortunately for me the tpms picked up 1 of the bad rims and the other tire went flat overnight. There are a lot of chug holes on the highway just waiting to test these wheels.

PSFORD99
06-13-2020, 03:51 PM
Rim issues may be rare but i had 2 rims crack in 3 years. The spoke wheels are very popular but the weak link is the spoke. I changed to the modular wheels to get away from the spokes 3 years ago and so far so good. I might have just gotten a bad batch of wheels but 2 wheels going bad was enough for me. Fortunately for me the tpms picked up 1 of the bad rims and the other tire went flat overnight. There are a lot of chug holes on the highway just waiting to test these wheels.


I see your reasoning, although I think its more about the tires. Maybe I was lucky with my spoke OE wheels on the 08

PSFORD99
06-13-2020, 03:59 PM
Even though our OEM rims were rated for 110psi when we upgraded our Sailuns we upgraded the wheels to take advantage of higher tire weight bearing rating.


3750 to 4200 per wheel


Lets see if I got this right, we have wheels rated for 3750, covering axles that are rated for 7K, so far so good ? Thats 7500 we can go on those wheels. Now we put on G rated tires rated for 4040 or 4400, correct ? Now we go ,and put on a wheel rated for 4200, that the axles can't cover, only rated for 7K not 8400, plus we got a pin weight of at least 20%, even lowering the amount of weight even more on the tires ,and wheels. Maybe I missed something ? :confused:

CalandLinda
06-23-2020, 06:44 AM
Lets see if I got this right, we have wheels rated for 3750, covering axles that are rated for 7K, so far so good ? Thats 7500 we can go on those wheels. Now we put on G rated tires rated for 4040 or 4400, correct ? Now we go ,and put on a wheel rated for 4200, that the axles can't cover, only rated for 7K not 8400, plus we got a pin weight of at least 20%, even lowering the amount of weight even more on the tires ,and wheels. Maybe I missed something ? :confused:

The limiter is the GVWR. When using tires with more than 3500# of load capacity on 7000# axles the remainder is called "load capacity reserves". RVIA has insured, with their load capacity reserve recommendation for tires on RV trailers to be 10%; I've always recommended 12% - 15%.

RV trailer manufacturer's very seldom use axles with load capacities beyond the axles GAWR limit because it invites overloading.

PNW Fireguy
06-23-2020, 09:08 AM
Lets see if I got this right, we have wheels rated for 3750, covering axles that are rated for 7K, so far so good ? Thats 7500 we can go on those wheels. Now we put on G rated tires rated for 4040 or 4400, correct ? Now we go ,and put on a wheel rated for 4200, that the axles can't cover, only rated for 7K not 8400, plus we got a pin weight of at least 20%, even lowering the amount of weight even more on the tires ,and wheels. Maybe I missed something ? :confused:




When I had IS installed we opted for 8k axles. Our Sailuns already had the rating to support this choice. I opted to change the wheels too. None of this changes the labeled GVW, however we are every pound of that weight.:socool: That coupled with the previous suspension failure I experienced this was my choice. While the config mathematically supports more than what should be the weight of the trailer it supports the dynamic force changes exerted on the suspension. Think apparent vs true wind.

PSFORD99
06-24-2020, 09:42 AM
When I had IS installed we opted for 8k axles. Our Sailuns already had the rating to support this choice. I opted to change the wheels too. None of this changes the labeled GVW, however we are every pound of that weight.:socool: That coupled with the previous suspension failure I experienced this was my choice. While the config mathematically supports more than what should be the weight of the trailer it supports the dynamic force changes exerted on the suspension. Think apparent vs true wind.

Now that makes more sense, I see the reasoning, with 7K axles I could not.

CalandLinda
06-24-2020, 01:59 PM
I opted to change the wheels too. None of this changes the labeled GVW.,

It also did not change the trailer's certified GVWR or GAWRs. Only the vehicle manufacturer or a certified vehicle modifier have that authority.

Replacement tires are selected to support the load capacity the OE tires supported. Therefor, they are not required to support the load of the individual axle's certified load capacity.

Tire load capacity reserves are figured from the vehicle certified GAWRs maximum load capacity.

(Example provided on request).

Ram Montana High Country
06-26-2020, 05:37 PM
It also did not change the trailer's certified GVWR or GAWRs. Only the vehicle manufacturer or a certified vehicle modifier have that authority.

Replacement tires are selected to support the load capacity the OE tires supported. Therefor, they are not required to support the load of the individual axle's certified load capacity.

Tire load capacity reserves are figured from the vehicle certified GAWRs maximum load capacity.

(Example provided on request).

Amen - THE LABEL IS THE LABEL - it's all about piece of mind or as mentioned "Reserve ... "

Our3820FK
07-09-2020, 02:53 PM
What is everyone using to fill the tires to 110PSI? I can't seem to find anywhere that will fill them. All the gas stations, Firestone, Discount tire, Goodyear etc... that I've stopped at only will fill to 90PSI. Are there portables I can get and carry? thanks

CalandLinda
07-09-2020, 03:22 PM
Amen - THE LABEL IS THE LABEL - it's all about piece of mind or as mentioned "Reserve ... "

No, it's about minimums and maximums. It's also a sworn statement to the DOT and all consumers that all minimum safety standards were complied with at the time of certification. It aids consumers in their decisions to maintain that minimum safety standard for that vehicle.

PNW Fireguy
07-09-2020, 03:30 PM
I carry a portable compressor. I have had no problem using Les Schwab to fill before I picked up our Via.

RK & Jen
07-09-2020, 03:31 PM
I carry a Fini Advanced 3.0 Gal 150 Max PSI compressor that I purchased at Menards to keep my 3790RD tires inflated to 110 PSI.

Carl n Susan
07-09-2020, 03:35 PM
I carry a Porter Cable 150 P.S.I. compressor from Home depot.

dhuhn
07-09-2020, 03:38 PM
What is everyone using to fill the tires to 110PSI? I can't seem to find anywhere that will fill them. All the gas stations, Firestone, Discount tire, Goodyear etc... that I've stopped at only will fill to 90PSI. Are there portables I can get and carry? thanks

I have a Viair that I carry, its run on 12 volts. Works great.
https://www.viaircorp.com/portables/400p-auto

sourdough
07-09-2020, 03:40 PM
What is everyone using to fill the tires to 110PSI? I can't seem to find anywhere that will fill them. All the gas stations, Firestone, Discount tire, Goodyear etc... that I've stopped at only will fill to 90PSI. Are there portables I can get and carry? thanks



I carry a Viair 400 in the event I need to use 12vdc and the Fini portable for 120vac.

Texan
07-09-2020, 05:05 PM
I carry a Porter Cable from Home Depot also for 99.00 . I have a larger Ingersol Rand compressor that i use at home. I've never had a problem with Discount Tire pumping 110 psi in my tires. You just need to show them the tires and wheels are rated for 110 psi.